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No. 404,516. Patented June 4, 1889.

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ALVIN S. BOICE, OF NEW RICHLAND, MINNESOTA.

LOCK.

SPECIFICATION forming part of Letters Patent No. 404,516, dated June 4,1889. Application filed August 15, 1888. Serial No. 282,760. (Model) T064% whom, it may concern.-

Be it known that I, ALVIN S. BOIOE, a citizen of the United States,residing at New Richland, in the county of Waseca and State ofMinnesota, have invented certain new and useful Improvements in Locks;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to combination-locks; and it consists in certainimprovements in the construction of locks of that class, as hereinafterdescribed and claimed.

In the accompanying drawings, Figure 1 represents an interior view of myimproved combination-lock. Fig. 2 is an interior view, certain partsbeing removed and the main bolt being represented as shot. Figs. 3 to15, inclusive, are detail views of various parts. of the lock mechanism.

A designates the main bolt of the lock, which is pivoted at a to avertical lever B, the foot of which is pressed by a spring Z), whichforces the main bolt out when the bolt is released, as hereinaftermentioned.

0 indicates a swinging catch, which is pivoted on a post 0, whichisfixed to the lockplate, the said catch being formed to connect with astud or projection a on the bolt A when said bolt is retracted, and alsoprovided with an arm 0, extending downward and hooking on one arm of anangular lever D, which swings on a fixed post d, and is pivotallyconnected at cl with one end of a sliding bar E. The bar E is inposition, as shown, to press against a loose trigger F, the form ofwhich is shown in Fig. 14. Y The said trigger is held in place betweenthe guides e, and an aperture is made in the face-plate of the look,through which the trigger extends when pressed out by the bar E.

G indicatesa plug which is formed with a square aperture to receive athumb-piece or night-key I, and has an arm or projection f to engagewith other parts, as hereinafter stated.

H indicates a pivoted catch, said catch being pivoted to the lock-plate,under the bolt A, at e, and having a projecting stud e A spring 0 tendsto raise the catch H, so that when the bolt A is shot the stud e isbrought to the bolt back of a shoulder 0 The catch H is provided with abent arm h, which is in position to be engaged by the arm f on the plugG when the latter is turned by means of the thumb-piece I.

L designates a plug having a square aperture, through which is passedthe knob-spindle. This plug, as well as the plug G, is shouldered andset in bearings in the lock-plates, and may be rotated therein. At itsforward edge the plug L is provided with a small pro-- j ection ornipple 'm.

- M indicates a plate provided with an opening which is surrounded withan annular flangen, which fits around the plug L, and is provided with aplane or straight portion 0" on one side. The plate M is formed with ashoulder a, an arm n extending downward, and guides 0 for thecombination-pin q. The plug L has an aperture 13 formed therein, andplate M has a similar aperture 19, which apertures may be brought inline with the combination-pin by turning the plug and plate around.

K indicates a long crooked lever, with its upper end against the upperpart of the easing. The said lever extends downward, closing about theplate M, as shown, the lower end of the lever being formed and inposition to connect with an angular projection of the catch H, and alsoto connect with the lever B. The lever K is held in place by a spring 8'and a projection s at the top of the case, and

by means of this lever, when engaged by plate M, the bolt A may bereleased from the catch H and retracted.

N indicates a rocking lever, which is pivoted on a fixed post 2?, theupper end of said lever being pivotally connected with a push-button O,which moves between the guides to in an aperture in the face-plate ofthe look. A spring a, fastened to lever N, presses against a shoulder eon the push-button and tends to move thelower end of lever N toward thetumblers. The lower end of the lever N is loosely connected by the notchand stud o with a movable bar P, from which a curved arm it) extendsupward. The combinationpin q, as shown in Fig. 3, has'a recessed orgrooved head to connect loosely with the curved arm '20 of the movablebar P, so that Y the pin is moved horizontally in either direction bythe movement of the lever N.

The tumblers fit around the flange n. of the plate M, and two of themare formed with notches 00, to admit the larger part or head of the pin(1 when the pin enters the holes 17 and 19 in the plate M and plug Lwhen the combination is on. Three tumblers are shown, being severallyindicated by R, R, and R with two intervening washers S, the inner edgesof which are formed with the straight portions y to close against theplane 1' on the flange 'n of plate M.

The tumbler B, being the first to be put in place on the plate M, has alip to connect with a tongue .2" on the next tumbler R. The tumbler Rhas a fixed pin or projection which extends through one of the holes zin the uppermost tumbler R 011 the tumbler R placed an annular plate orfiat ring T, which is provided with an outward projection .2, whichconnects with the pin .2 which extends through the tumbler R The ring Tfits about the plug L and is notched on its inner edge, and the nipplein on the plug enters one of the notches in the ring. The connection isthus formed between the knob-spindle and the several tumblers, and bythe use of different notches in the ring T and the several holes in thetumbler R many different combinations may be formed. The lever N, beingactuated by the spring a, presses forward the pin q, and when thecombination is on, the apertures in L and M being in line with the pinand the tumblers being turned to position to receive the head of thepin, the latteris driven into the apertures 19 and p, and connection isformed between the knob-spindle and the long lever K. By pressing in thepush-button O the combination-pin is withdrawn from the plug L throughthe action of leverN and bar 1, and the combination may be thrown.

hen the door is open, the bolt A being retracted, the trigger F projectsthrough the face-plate F of the lock, the catch 0 being kept by a spring(6 in connection with the stud a on the bolt, so that the bolt is lockedinward, and when the door is closed the trigger is pressed in by contactwith the plate on the door-casing and presses backward the bar E, which,through lever 1), brings down the catch G from connection with the stud(t', and the bolt is driven forward by the spring I) and the lever B. Asthe bolt is driven out, the pivoted catch H is raised by the spring 0bringing the stud c to the bolt just back of the shoulder a, and thuslocks the bolt out ward, so that it cannot be pressed inward by pressureagainst the head or .lfoi'ward end of the bolt.

The thumb piece or key I is used from the inside in connection with thepivoted catch II and lever B. By the use of this key the door may beunlocked whether the combination is on or oil, the plug G being turnedso that the arm f presses down the curved arm 7b of the catch II andthen presses back the lever 1%, thus retracting the bolt. 13y partiallyturning the key I to the right, so that the arm f is turned upwardagainst the catch II, a solid lock is made of bolt A each time the dooris closed, and it cannot be retracted by means of the knob-spindle untilthe key is turned to the left. The plug G is retained in its differentpositions by the spring 7s.

When the combination is on and connection is formed between the plug Land the plate M, the bolt may be retracted by turning the knob-spindlein either direction,the plate M engaging lever K and said lever pressingdowmvard the catch II and then moving against the lever B, pressing itbackward. The bolt is thus retracted, and so remains until the door isclosed, when the bolt is again shot by the action of the trigger F. Thecombination-pin being withdrawn from plug L, by pressing inward thepush-button, the combination may be thrown by turning the knobspindle bywhich the plug L is rotated within the flange a of plate M.

The trigger F is formed with its edge somewhat rounded for contact withthe plate on the door-casing, and is so constructed that it cannot bedriven entirely out from. the lock ease by the sliding bar E.

The bolt A is somewhat beveled, and may be made to operate as aspring-catch by turning the plug G with the key I, so that the arm f ofthe plug bears down the arm h of the catch H and holds it so that thestud c is not in position to connect with the bolt. Then,the door beingopen, press in the trigger F, driving out the bolt A, and the door maythen be closed, the bolt yielding to pressure in the ordinary way.

The combination may be found when desired by using a piece of bent wireQ, (800 Fig. 1.5,) the prongs of said wire being passed through twosmall holes .9 in the lock-plate. The ends of the wire come in contactwith the lirst tumbler near its edge, and the tumblers are then turneduntil their notches register with the wire.

I claim- 1. In combination with the loclebolt, a pivoted catch adaptedto connect with said bolt when retracted, a loose trigger constructed toproject through the face-plate of the lock and to be pressed inward, asliding bar in position to engage with said trigger, and a suitabledevice connecting said bar with said catch, by which the said bolt maybereleased, substantially as set forth and described.

The combination, with the main bolt, of a lever connected therewith andprovided with a spring which is adapted to thrust forward said belt, apivoted catch adapted to detain said bolt when retracted, a slidingbar,a loose trigger constructed to project through the faceq ilate ofthe lock, to be pressed inward, and to engage said sliding bar, and apivoted angular lever which is loosely con- ITS nected with said catchand the sliding bar, substantially as set forth and described.

3. The combination, with the main bolt provided with a shoulder 0 of apivoted catch H, provided with a stud e in position to connect with saidbolt, a spring-lever adapted to drive said bolt, and a rotative plug G,provided with an arm and adapted to engage said pivoted catch and saidspring-lever successively, substantially as set forth and described.

4. In a lock, in combination with the knobspindle, a circular plugfitting on said spindle and provided with a nipple m and an aperture 19,a plate M, provided with an annular flange fitting around the said plugand provided with an aperture, with which the aperture 19 may be broughtin line, a pin supported in position to enter said apertures andprovided with means for projecting and withdrawing it, a series ofnotched tumblers adapted for engagement with said plug and said pin, alock-bolt, a pivoted catch constructed to lock said bolt after it isdriven forward, and a lever .K, constructed to engage with plate M andwith said pivoted catch, substantially as set forth and described.

6. In combination with the knob-spindle,

the rotative plug L, fitting thereon and pro vided with a nipple m, thenotched ring T, with projection z, and a series of tumblers adapted tobe engaged by said ring, substantially as set forth and described.

In testimony whereof I have affixed my signature in presence of twowitnesses.

ALVIN S. BOICE.

Witnesses:

E. E. DUNWOODY, LEwIs M. PASCHALL.

